If you need support on self hosting and it’s affecting your uptime and end user experience, maybe it’s better to choose managed hosting. We offer a variety of affordable plans at https://www.communiteq.com/discoursehosting/pricing/
Our plans come with full inbound and outbound email service and we manage updates and backups for you. We also support all kinds of plugins including the restricted replies plugin.
Last but not least, we can perform a migration to our platform with minimal downtime.
Don’t hesitate to reach out if you want more information!